-/*
- * Helpers for dealing with type specifiers.
- * Copyright © 2011, 2021 Nick Bowler
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#include <stdio.h>
-#include <stdbool.h>
-#include <assert.h>
-
-#include "cdecl.h"
-#include "cdecl-internal.h"
-
-/*
- * We can represent type specifiers as a bitmap, which gives us a finite
- * list of acceptable bitmap values according to the C standard. However,
- * the "long" specifier is allowed to occur more than once, but only at most
- * 2 times. Treat it as a special case, assigning an unused bit to represent
- * the second long.
- */
-#define CDECL_TYPE_LLONG (CDECL_SPEC_TYPE + 31)
-
-static inline unsigned long spec_bit(unsigned type)
-{
- return 1ul << (type & (CDECL_SPEC_TYPE - 1));
-}
-
-static unsigned long add_typespec(unsigned long map, struct cdecl_declspec *s)
-{
- assert(s->type >= CDECL_SPEC_TYPE && s->type < CDECL_TYPE_LLONG);
-
- if (s->type == CDECL_TYPE_LONG) {
- if (map & spec_bit(CDECL_TYPE_LLONG)) {
- fprintf(stderr, "too many long specifiers\n");
- return -1;
- } else if (map & spec_bit(CDECL_TYPE_LONG)) {
- return map | spec_bit(CDECL_TYPE_LLONG);
- }
- }
-
- if (map & spec_bit(s->type)) {
- fprintf(stderr, "duplicate type specifier\n");
- return -1;
- }
-
- return map | spec_bit(s->type);
-}
-
-unsigned long cdecl__build_typemap(struct cdecl_declspec *s)
-{
- unsigned long map = 0;
-
- for (struct cdecl_declspec *c = s; c; c = c->next) {
- if (cdecl_spec_kind(c) != CDECL_SPEC_TYPE)
- continue;
-
- map = add_typespec(map, c);
- if (map == -1)
- return -1;
- }
-
- switch (map) {
- case 0:
- fprintf(stderr, "no type specifiers\n");
- return -1;
-# include "validtypes.h"
- return map;
- default:
- fprintf(stderr, "conflicting type specifiers\n");
- return -1;
- }
-}